The White House has warned that disaster would strike in case Congress doesn’t raise the ceiling on national debt. With very little money to pay lenders, the US government will default, interest rates will soar and the US economic recovery will collapse. Behind the scenes, however, Treasury Secretary Timothy Geithner has already started his planning. With debt expected to hit the $14.3 trillion limit in a matter of few weeks, Geithner has a number of options available, including borrowing cash from a federal workers’ pension fund. Markets are already concerned about the growing disagreement over the debt limit, which is expected to keep Congress occupied when lawmakers return from Easter break next week.